[ci] Fix incorrect filtering logic for prereleases

[poteto]

The workflow was correctly publishing the package(s) specified in only, but due to incorrect logic it would also run the 'Publish all packages' step.

[react-sizebot]

Comparing: 4fdf7cf...b672d53

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	+0.11%	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	536.14 kB	536.14 kB	=	94.81 kB	94.81 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	+0.16%	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	663.96 kB	663.96 kB	=	117.04 kB	117.04 kB
facebook-www/ReactDOM-prod.classic.js	=	687.83 kB	687.83 kB	=	121.08 kB	121.08 kB
facebook-www/ReactDOM-prod.modern.js	=	678.26 kB	678.26 kB	=	119.43 kB	119.44 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against b672d53